Abstract: Provided is a DC/DC converter capable of providing overvoltage protection reliably without being affected by, for example, an external element connected to an output terminal. The DC/DC converter includes a comparator, an RS-FF circuit, a drive circuit, and an ON-timer circuit, and the ON-timer circuit includes: a current source circuit which provides an electric current based on a power supply voltage; a ripple generation circuit which generates a ripple voltage; an averaging circuit which averages the ripple voltage; a timer circuit which generates an ON-timer signal; and an overvoltage protection circuit (clamp circuit).

Abstract: The present description concerns a device for delivering a voltage from an AC voltage, comprising a capacitive element (120), two switches (132H, 132L) in a half-bridge between terminals of the capacitive element (120); terminals (102, 104) of application of the AC voltage; a transformer (160), comprising a first winding (162) coupling to a junction node (136) between the switches (132H, 132L) one of the terminals (104) of application of the AC voltage; and one or a plurality of circuits (170, 180, 140), configured to switch the switches (132H, 132L) and receive an AC current (I164) flowing through a second winding (164) of the transformer (160) and regulate the voltage delivered by the device by acting on a frequency of said AC current and/or on a phase shift of said AC current with respect to its reception.

Abstract: A power conversion device includes a power converter including a plurality of arms and a control device to control voltages of a plurality of sub modules by PWM control using a carrier signal for each sub module. The sub module includes a plurality of switching elements, a power storage element, a pair of output terminals, and a bypass switch. When the control device detects failure of a sub module in an arm, it performs stop processing for stopping a switching operation of the plurality of switching elements included in at least one sub module of the plurality of sub modules in the arm and has the sub module failure of which was detected bypassed. After the control device performs the stop processing, it equalizes intervals among phases of carrier signals of a plurality of normal sub modules in the arm caused by failure of the sub module.

Abstract: Disclosed are an isolation type power conversion method based on demagnetization iteration control and a power conversion circuit. The power conversion circuit comprises a high-frequency transformer, wherein a primary side of the high-frequency transformer is electrically connected with a primary side power tube in a power switch tube circuit, a secondary side of the high-frequency transformer is electrically connected with a charging capacitor circuit and an output feedback circuit through a secondary side synchronous rectifier tube, and the primary side and the secondary side of the high-frequency transformer are electrically connected with a power conversion integrated control chip.

Abstract: An inductive-load control circuit includes a circuit board on or in which a controller and a driving circuit are disposed, an inductive load disposed at a location apart from the circuit board and connected to the driving circuit of the circuit board, a detection resistor group included in the driving circuit and connected in series with the inductive load, and a temperature measuring element. The detection resistor group includes resistors. The temperature measuring element is disposed between the resistors. The controller and the driving circuit are supplied with electric power by a power supply. The driving circuit controls the electric power supplied by the power supply and applies the electric power to the inductive load. The circuit board has a signal ground connected to the controller and a power ground connected to the detection resistor group of the driving circuit. The temperature measuring element is connected to the power ground.

Abstract: Aspects of direct current (DC)-DC converters with an integrated matrix transformer and multiphase current doubler rectifiers are described. In some examples, a DC-DC converter can include a matrix transformer that has multiple magnetically integrated transformer components that are magnetically integrated using transformer components that share a top plate and a bottom plate. A multiphase current doubler rectifier can include multiple synchronous rectifiers corresponding to the plurality of transformer components of the matrix transformer.

Abstract: A control circuit used in a switch mode power supply is provided. The control circuit has an error amplifier, a first compensation network having a first resistance and a second compensation network having a second resistance. The error amplifier has a first input terminal, a second input terminal and an output terminal. The first compensation network is coupled between the first input terminal and the output terminal of the error amplifier. The second compensation network is coupled to the first input terminal of the error amplifier. When the switch mode power supply enters the transient state, the control circuit increases the first resistance of the first compensation network or decreases the second resistance of the second compensation network.

Abstract: An electronic device has a power rail that is driven by voltage regulators and provides a rail voltage. Each voltage regulator has an output interface electrically coupled to the power rail to deliver up to a predefined regulator current to the power rail. In each voltage regulator, a voltage regulator controller has an input coupled to the output interface by a feedback path and controls a drive path coupled to the output interface. A bypass unit is coupled to the drive path and voltage regulator controller and operates in a standby mode or an operational mode. In the standby mode, the bypass unit bypasses the feedback path and the respective voltage regulator does not deliver current to the power rail, while in the operational mode, the bypass unit does not bypass the feedback path and the respective voltage regulator delivers up to the predefined regulator current to the power rail.

Abstract: A power supply device includes a power supply circuit configured to output different voltages to a plurality of output lines, a plurality of capacitors provided in correspondence with the plurality of output lines, one end of each of the plurality of capacitors being coupled to a corresponding output line of the plurality of output lines and an other end thereof being coupled to a ground potential, a plurality of diodes provided in correspondence with the plurality of output lines, anodes of the plurality of diodes being coupled to the corresponding output lines and cathodes thereof being commonly coupled, and a discharge resistor coupled to the cathodes of the plurality of diodes.

Abstract: Multi-level DC-to-DC converter circuits and methods that permit a full range of output voltages, including near and at zone boundaries. Embodiments alternate among adjacent or near-by zones, operating in a first zone for a selected time and then in a second zone for a selected time. Embodiments may include a parallel capacitor voltage balancing circuit that connects a capacitor to a source voltage to charge that capacitor, or couples two or more capacitors together to transfer charge, all under the control of real-time capacitor voltage measurements. Embodiments may include a lossless voltage balancing solution where out-of-order state transitions are allowed, thus increasing or decreasing the voltage across specific capacitors to prevent voltage overstress on the converter main switches. Restrictions may be placed on the overall sequence of state transitions to reduce or avoid transition state toggling, allowing each capacitor an opportunity to have its voltage steered as necessary for balancing.

Abstract: To prevent deterioration of current detection accuracy due to a difference in deterioration between a main MOS and a sense MOS. The load drive device includes a main MOS (101) for supplying a load current to a load, a sense MOS (102) to be used for detection of the load current, and an equalizer circuit (110) and a switch (120) which are provided in parallel between the source terminal of the main MOS and the source terminal of the sense MOS. The drain terminal of the main MOS and the drain terminal of the sense MOS have a common connection, and when a current is detected, the terminal voltage of the main MOS and the terminal voltage of the sense MOS are equalized by the equalizer circuit, and the switch is opened. When a current is not detected, the equalizer circuit is stopped and the switch short-circuits the source terminal of the main MOS and the source terminal of the sense MOS.

Abstract: The present invention relates to an apparatus for maximizing the power of a multi module solar string power generation system, comprising an Injection Circuit (IC), connected to a DC bus and to a string of solar panels, wherein the IC is also connected to at least one separated solar panel of the string. The IC regulates the power production of the connected string and utilizes the excess power to the solar inverter. The IC comprises: (i) a first MPPT mechanism, for finding the MPP of the string; (ii) a second MPPT mechanism, for finding the MPP of the separated panel; (iii) a first DC/DC converter, for converting some of the power, from the separated panel, to regulating power for the connected string; and (iv) a second DC/DC converter, for converting and utilizing, the excess power from the separated panel, to the solar inverter using the DC bus.

Abstract: According to one embodiment, an electronic circuit includes: a first circuit configured to generate a first current and output a first voltage, the first voltage being one of a voltage based on the first current and a first predetermined voltage; a second circuit configured to generate a first output current based on the first voltage; a first output terminal outputting the first output current to a first switching device; a first input terminal having a first input signal inputted, the first input signal relating to driving and non-driving of the first switching device; and a third circuit configured to generate a first control signal based on the first input signal, the first control signal switching the first voltage to the first predetermined voltage and stopping the first current.

Abstract: A booster circuit includes a boost converter configured to boost an input voltage and performs feedback control such that an output voltage becomes a set value on the basis of a voltage applied to a feedback terminal and an internal feedback reference voltage, a power supply unit configured to generate a reference voltage with a smaller error than the feedback reference voltage, and a control unit configured to compare a voltage corresponding to the output voltage of the boost converter with the reference voltage, and configured to output a control signal indicating a comparison result to the feedback terminal of the boost converter.

Abstract: The present disclosure relates to solutions for operating a flyback converter comprising an active clamp. The flyback converter comprises two input terminals and two output terminals. A first electronic switch and the primary winding of a transformer are connected in series between the input terminals. An active clamp circuit is connected in parallel with the primary winding. The active clamp circuit comprises a series connection of a clamp capacitor and a second electronic switch. A third electronic switch and the secondary winding of the transformer are connected in series between the two output terminals. In particular, the present disclosure relates to solutions for switching the first, second and third electronic switch in order to achieve a zero-voltage switching of the first electronic switch.

Abstract: An isolated power converter package includes a leadframe including a first and second die pad, first and second supports connected to first leads, second leads. A first semiconductor die is on the first die pad and a second semiconductor die is on the second die pad. The molded transformer includes a top and bottom side magnetic sheet each having a magnetic mold material including magnetic particles in a second dielectric material on respective sides of a laminate substrate including a dielectric material and a first coil and a second coil that each include a coil contact. Edges of the laminate substrate are on the supports. Bond wires are between the first die bond pads and the second leads, between the second die bond pads and the second leads, between the first die bond pads and coil contacts, and between the second die bond pads and the coil contacts.

Abstract: A DC-DC converter includes: a first capacitor, a second capacitor, a first switch device, a second switch device, a third switch device, a fourth switch device, a flying capacitor, where one end of the flying capacitor is coupled to the first intermediate node, the other end of the flying capacitor is coupled the second intermediate node; and the protective circuit, including a clamping unit and a buffering unit, where when a voltage between the positive end of the bus and the negative end of the bus increases, the clamping unit clamps the first switch device to a voltage of the first capacitor, and clamps the fourth switch device to a voltage of the second capacitor, and the buffering unit reduces a current flowing through the clamping unit and the flying capacitor.

Abstract: A framework for power management. The framework includes at least one power distribution board disposed within a radio-frequency (RF) cabin of a medical imaging system and coupled to an external reference clock. The power distribution board may include a clock circuit that generates one or more output clock signals based on a reference clock signal from the external reference clock. One or more switching regulators may be coupled to the clock circuit. The one or more switching regulators may be synchronized to the one or more output clock signals and provide power to one or more endpoint loads.

Abstract: A DC-DC converter includes an output terminal, a reference voltage source, an error amplifier, and a compensation circuit. The error amplifier is coupled to the output terminal and the reference voltage source. The error amplifier is configured to generate an error signal representative of a difference between a voltage at the output terminal and a reference voltage provided by the reference voltage source. The compensation circuit is coupled to the error amplifier. The compensation circuit includes a resistor, a capacitor, and a switch control circuit. The resistor is coupled to the error amplifier. The capacitor is coupled to the resistor. The switch control circuit is configured to modulate connection of the resistor to the capacitor based on a switching frequency of the DC-DC converter.

Abstract: GaN-based half bridge power conversion circuits employ control, support and logic functions that are monolithically integrated on the same devices as the power transistors. In some embodiments a low side GaN device communicates through one or more level shift circuits with a high side GaN device. Various embodiments of level shift circuits and their inventive aspects are disclosed.